Condition Monitoring Photovoltaic Energy Systems-based reliability Research Paper

Condition Monitoring Photovoltaic Energy Systems-based reliability - Research Paper Example Major PV Modules and Types Solar energy is considered as a major basis of renewable and sustainable power which can be effectively generated through the utilisation of the PV method. The PV system consists of constructing blocks which are also termed as modules or cells that are connected together and is able to transform ‘sunlight into electricity’. According to Chow, PV system generates low Green House Gas (GHG) emission and is also recognised as a clean basis of energy. PV system is developed by assimilating variety of semiconductor materials so as to generate power with high capacity. There are four major types of PV modules which are ‘crystalline silicon’, ‘polycrystalline’, ‘amorphous silicon module’ and ‘thin-film module’. Every PV modules have diverse efficiencies owing to which the overall performance of these PV modules tend to rely on the ingredients as well as the operating situations based on various factor s such as temperature, intensity of solar radioactivity and the inclusive design of the system. Furthermore, the orientation and location of PV array also creates a significant impact on the electricity production capacity through the usage of solar energy depending on the weather conditions. The four major types of PV modules, i.e. crystalline silicon, polycrystalline, amorphous silicon and thin film (Chow, â€Å"Modeling Urban Solar Energy with High Spatiotemporal Resolution†). As stated by Mangersnes, Crystalline PV modules are frequently specified as being the most reliable component of the PV system. This presumable reliability is demonstrated through its large warranty periods. Crystalline Silicon PV is the most extensively used PV technology. It is developed through solar cells made by ‘crystalline silicon’. This type of cells is equipped with high level of affectivity and thus is also regarded as an interesting technology. In general, there are two kinds of solar cells which are ‘mono-crystalline silicon’ and ‘multi-crystalline silicon’. Mono-crystalline silicon is developed by cutting wafers from high clarity single crystal lump. Similarly, the multi-crystalline silicon is developed by cutting a cast tablet of silicon into blocks and wafers. In general, mono-crystalline silicon cells have much higher effectiveness in comparison to multi-crystalline silicon solar cells. The crystal type module usually applied for this technology is iron glass which is combined with anti-reflective layer, to make sure that the maximum solar radioactivity spreads to the crystalline solar cells and thus the energy generating capacity can be enhanced (Mangersnes, â€Å"Back-contacted Back-junction Silicon Solar Cells†). Polycrystalline PV modules include small silicon glass pieces. Polycrystalline is generally used for developing gate constituents in semiconductor devices. Polycrystalline modules are most commonly used f or generating electricity, as it is considered to be quite inexpensive in comparison with other PV modules. The reason for polycrystalline modules to be inexpensive is owing to its production procedure. In the production process of polycrystalline, the melted silicon is dispensed into a cast rather than into one single crystal. The components of polycrystallin

Michigan History2 Research Paper Example | Topics and Well Written Essays - 250 words

Michigan History2 - Research Paper Example The area was also important to the French because it acted as a link between the Great lakes in the West and the Illinois County in the South. The area grew to become a military town, housing the French military. The inhabitants of this town would have looked forward to having one of the greatest commercial centers and a Military Fort. In the late 17th Century, the French were abandoning their forts in America. Viewing this as an invitation to the British to occupy the evacuated Forts, Cadillac requested the French government to allow him to build a new settlement in the Northern part of America. He chose to settle in the area near Lake Huron, then known as Le Detroit. He chose this area because of its fertile land, its hospitable climate, and its strategic location near the river. He brought Farmers, traders, soldiers, artisans and Native Americans from Montreal to settle in the place which later became known as Detroit. The final resting place of this famous Jesuit priest who helped convert Indians to Catholicism has been a subject of controversy over the years. He died on 18th may, 1675, aged 38 after enduring a fight with Tuberculosis. In 1972, bones believed by many scholars to be his were excavated at St. Ignace. These bones might have been brought by Indians. Other places associated with his final resting place include Ludington and

A Street Car Names Desire Essay Example for Free

A Street Car Names Desire Essay A Street Car Named Desire deals with a culture clash between the Old South’s â€Å"plantation† mentality (priding itself on false pretenses) and the New South’s relatively uncivilized, yet real, grip on reality. The two characters who come to represent this tension are Blanche and Stanley Kowalski. Blanche advertises herself as a champion of â€Å"Southern Honor. † This entails an unfaltering dedication to virtue and culture. These are not, however, driving factors in her life but only mask her alcoholism and delusions of grandeur. By contrast, Stanley is an industrial worker who acts on habit and structure. Tennessee Williams juxtaposes illusion and reality by depicting the antagonistic relationship between the two by consistently employing symbolism. Blanche is constantly escaping the realities of life by retreating into her own fabrications. Her plummet into a delusional world begins when her beloved husband reveals himself to be gay and, soon after, shoots himself. She falls into a spiral of affairs after this event in a search to find emotional satisfaction and to reaffirm her womanhood. She ignores the obvious detrimental effect of her intimacies because all she wants is to be happy again: to be loved. Blanche physically escapes the reality of her life by leaving Belle Reve and Laurel to go to her sister’s home in New Orleans. Here, she misrepresents who she is and enters another relationship where she recreates her identity. When confronted about her lies, Blanche explains that she lies because she refuses to accept the hand fate has dealt her: I dont want realism. I want magic! Yes, yes, magic! I try to give that to people. I misrepresent things to them. I dont tell truth, I tell what ought to be truth. And if that is sinful, then let me be damned for it! (Williams, 34) Lying to herself and to others allows her to make life appear as she thinks it should be rather than as it is. Her final, deluded happiness (as her sister and Stanley commit her to an insane asylum) shows her acceptance that illusion is an adequate reality, but it also shows reality’s inevitable triumph. The driving force of reality, embodied by Stanley Kowalski, quickly dismantles all the falsities Blanche comes to represent. He is a practical man firmly grounded in the physical world who disdains fabrications. He finds meaning only in the primitive and straightforward: â€Å"Theres something downright bestial about him! He acts like an animal, has animals habits! Yes, something ape-like about him† (71). An animal would not create an alternate reality for a situation but would act according to the real, harshness of life in order to ensure its own survival. Stanley’s animal habits can be looked at as an appreciation only for tangible truths. In the end, Stanley succeeds in debunking all the false images Blanche created about herself. He goes out of his way to reveal Blanche’s past and then flaunts it in a crude, insensitive way: â€Å"Take a look at yourself here in a worn-out Mardi Gras outfit, rented for 50 cents from some rag-picker Do you know that Ive been on to you from the start, and not once did you pull the wool over this boys eyes? Ha ha! Do you hear me? Ha ha ha† (67). Stanley again asserts his bestial tendency, but this time to show his dominance. When he proceeds to physically rape her, he metaphorically strips her of the false reality she created. Williams uses symbolism to show that Blanche is trapped in a life of delusion. The Varsouviana Polka and the use of light are reoccurring symbols that elude to her disconnect with reality. The Polka is the music that played the night her husband committed suicide. Blanche says that it ends only after she hears the sound of a gunshot in her head. It plays at various points in the play, symbolising this event that triggered her mental decline. Whenever a situation gets too â€Å"real,† Blanche firmly believes she hears the Varsouviana, panics, and looses her grip on reality. Also, throughout the play, Blanche avoids appearing in direct, bright light, especially in front of Mitch: â€Å"And turn that over-light off! Turn that off! I won’t be looked at in this merciless glare†(45). It is clear she avoids the lights in efforts to conceal the reality of her age and fading beauty. Symbolically, Blanche avoids light in order to prevent Mitch from seeing her for who she is. She, once again, retreats into her own world of illusion. Blanche is never able to be looked at â€Å"in the light† and exposed. She never faces reality. Both Stanley and Blanche have a hard time relating to the other gender without sexual implications. The difference is that Stanley is upfront about this â€Å"animalistic† behavior towards women, while Blanche tries to paint herself as above the primitive nature of her sexual impulses. We can call one approach realistic and the other delusional, but it doesn’t change the fact that both characters approach interactions in a sexual way. What does this say about the nature of what is real and what isn’t? Williams seems to draw an ambiguous line. This implies that reality and illusions coexist in our lives, and what we choose to label our views and actions is just a matter of perspective.

Elaphurus davidianus :: science

Elaphurus davidianus Pere David’s deer is a rare Asian animal. Its original home is found in northeastern and east central China. In 1865, a French missionary by the name of Father Pere Armand David was visiting China. While looking over the wall of the Emperor’s Imperial Hunting Park he observed a captive herd and later learned that the animals had been extinct from the wild for over 1000 years. He also discovered that this was the last remaining herd in china, and quickly took actions to preserve it. When Father David sent word to Europe about this rare species of deer it aroused much attention and resulted in getting a substantial amount of deer sent to several zoos throughout Europe. This deer is in the tribe of Cervidae, and of the order Artiodactyla. They are a medium sized deer with a height of about 120 cm (male is four feet while the female is slightly smaller.) The weight ranges from 300 (females) to about 550 pounds (males). The Chinese call this deer the â€Å"four unlikes,† because of its odd looking features. Unlike most deer, the Pere has a long bushy tail that resembles a donkey, a hose-like gait, broad, upturned hoofs, small ears, and â€Å"backward† antlers. The most distinctive characteristic would be the antlers. On the Pere, the main stem of the antlers lies forward of the head, while on other deer it lies towards the back. They fork right above the base, the tines point backwards, the last prong is unbranched and the first only branches once. The antlers reach a height of about two and a half feet. In the summer their coats are a reddish brown that dims to a grayish brown in the winter. It is thought that their original homes were in swampy, reed-covered marshlands. Their diets consist of, steppe’s grass, and water plants. They live to the age of 20 in the wild and 23 in captivity, they reach maturity at 14 months and are born around April or May, they spend about nine months with their mothers before they are weaned. The breeding of this species is very difficult and time consuming. Another strange trait of these magnificent animals is their love of water. They will spend hours standing in water up to their shoulders. Most of the deer from the original herd that were left in China were wiped out in 1895 by a severe flood, and the remaining deer were killed during the Boxer Rebellion in the early 1900’s.

Lord Of The Flies Chapter 5 Essay

The boys life has deteriorated a lot since they first arrived on the island and from the look of the situation things can only get worse unless they change their behaviour and attitude . There is a lot of conflict between Ralph and Jack, the fear of the unknown is growing, the boys are turning into savages and becoming more uncivilised by the day, rules and taboos are being disobeyed and ignored, and bullying and rivalry is becoming more of a problem. The conflict between Ralph and Jack is causing a lot of tension in the group and is therefore affecting the boys lives. It has already divided them into separate groups with different priorities as some have followed Jack and some have followed Ralph. Jack and Ralph’s different priorities is the main reason for the conflict between them as they are completely opposite. Jack wants control and started of wanting to be leader but was out done by Ralph who was voted the leader. Jack is short tempered and very big headed where as Ralph is realistic, kind hearted and organised. Ralph’s main priority is to be rescued and have fun have fun on the island. Their relationship is described in the book as ‘two continents of experience’ and ‘ baffled in love and hate’. Their personality also clash as they are completely different. Ralph is optimistic, respectful, fair, practical and naà ¯Ã‚ ¿Ã‚ ½ve, where as Jack is arrogant, boastful, power hungry, self centred, easily angered and brutal. The boys fear of the unknown is represented in different ways but is rapidly growing and could get out of hand. It started of as being a beastie, then a snake like creature, and now a beast from water or even a ghost. At first it was only the ‘litluns’ that were scared of the beastie and believed it existed but now the older boys are starting to get worried and have their doubts so none of the quite knows what to believe. Even Ralph has his doubts about what the thing is and he is supposed to be leader, ‘ I don’t believe in ghosts at least I don’t think so’. This comment from Ralph shows that he is now considering there being some type of creature on the island even though he just dismissed the idea at the beginning. Deterioration has also been caused by the boys becoming totally uncivilised and turning into savages. Although they are now looking like savages as their hair has grown, Jack is mainly responsible for them turning into savages. He was so obsessed with hunting to kill that he influenced the other boys that became his hunters. At the beginning they hunted but did not manage to kill for a ling time. Then when Jack finally did he became even more obsessed and made masks that he could hide behind while hunting, ‘ the mask was a thing on its own, behind which Jack lived’. This made Jack a different person when he put on the mask, he was a killer with no taboos or responsibilities. Jack’s passion for hunting also caused a major disagreement between him and Ralph because on the day a ship went by the fire was let out by boys that Jack made go hunting with him that day. Ralph said to Jack when he got back ‘ There was as ship, you let the fire out.’ There was a strong chance that they may have been rescued then but down to Jack they ended up eating their first pig. From successfully killing his first pig Jack felt very strong and had fulfilled his ambition so did not really care about the fire or Ralph. Rules have been completely ignored lately and systems of organisation disrespected. This has led to the boys becoming lazy and uncivilised. At one point things were going well and most things were well organised. There was toilet system worked out so there was not mess all over the island and water was being stored in coconut shells in the shade so hat it would be cool and fresh. Though now these systems have been ignored and the boys are going to the toilet anywhere on the island and no water is being stored. Ralph also tried to built shelters for them to sleep in which would have been practical but Simon was the only one that would help in the end so they could not be completed. This shows how disorganised the boys have become and disrespectful. They have no taboos and without adults they have forgotten the way they had to behave. Bullying has also become a problem that has led to a deterioration in the boys life. Jack consistently picks on Piggy and uses him as scapegoat for his own mistakes. He makes little of Piggy and by doing this he is trying to show that he has power over the boys as well as Ralph. The litluns are also being ignored and sometimes bullied by the elder boys. Although this might have happened a bit before they arrived on the island but there were still taboos that the older boys had. All these reasons have led to deterioration in the boys life. Their behaviour on the island has had consequences and meant that their lives have become less structured and disciplined and more savage like. Ralph described the situation by saying, ‘we are all drifting and things are turning rotten’. This shows us that the boys are drifting apart and could possibly separate into different groups completely which would also make their life deteriorate more.

Patients Dealing with Poverty Essay

Poverty affects almost half the world. Over three billion people live on less than $2.50 a day (Global Issues). The United States, one of the wealthiest nations in the world, accounts for almost 12% of these statistics. In addition to these people, another 50 million are â€Å"near poverty† level. Even more alarming, according to the 1999 Census Bureau, over 16% of all children in the United States live in poverty verse the recorded 12% of adults (Yahoo Health). I chose to write about people living with poverty because God has really placed the issue on my heart this year. Last May, my father lost his job and became homeless. I am happy to say he is now employed and looking for housing. After seeing the effects of poverty first hand, I have felt tremendously compelled to reach out to those in need. I have applied for an Episcopal Urban Intern Program through AmeriCorps and if I am accepted, I will be working with them starting in August. God has really blessed me with a heart of compassion and understanding, and I want to use that gift to serve others to the best of my ability. Poverty is a global issue that affects every corner of our world. There are an endless amount of people suffering in every county and many issues to be discussed. Because there are so many people affected worldwide, I am only going to focus on the effects in the United States for this essay. So, what is poverty? Poverty can be defined in several different ways. According to the US Census Bureau, poverty is measured in numbers. Any person living on a yearly income of $11,136 or under (add $2,820 for each additional person in the household) is considered to be in poverty (US Census 2010). However, the social definition of poverty is any person living with a lack of essential items such as food, clothing, water, and shelter (Think Quest). Minority racial and ethnic groups are much more likely to live in poverty. Also, poverty is much more prevalent in single, female-headed households (Yahoo Health). It is extremely important to be educated about the kinds of people living in poverty, especially if you are a healthcare worker, because the effects of their financial status greatly impact their well-being. Individuals living at or near poverty level suffer a variety of chronic ailments. They often have no health insurance so they rely on emergency rooms for care and often do not fill their prescriptions. They frequently postpone getting medical care due to lack of insurance and also have shorter life spans (Society of Teachers of Family Medicine). For every small decrease in income we see a significant decrease in health outcome. Another big concern of poverty-level individuals is that they are more likely to smoke and to live sedentary lifestyles (Hope Through Healing Hands). In a study done in year 2000, researchers found that more than one third of people living in poverty had a drug or alco hol problem. Also, more than half (56%) of those studied reported not having enough to eat at sometime in the last year (Society of Teachers of Family Medicine). Lack of nutrition, for any period of time, can cause detrimental effects on the body such as weight loss, bone deterioration, and even death (Merck Manuals). Mental health issues such as depression and anxiety were also very prevalent in this study of poverty-stricken people. Something very interesting to me about this study is that in response to interview questions about issues in daily life, personal health and/or access to health care services were the third most commonly cited concerns (employment and housing were the top two concerns). Among these health concerns, costs and health insurance coverage were the biggest issues raised. Nearly half of Americans whose incomes are below 150% of the poverty level are without insurance coverage. In contrast, only about 40% of those with incomes below 100% of the poverty level are without health insurance (Society of Teachers of Family Medicine). This is due to the target income range of government programs. Federal and state programs (such as Medicaid) help tremendously with insuring those at poverty level. However, there are many others considered the â€Å"working poor† who do not qualify for these programs. These people all too often have to choose between paying for meals and paying for health care. Those living in poverty that do have health insurance from government programs often have very limited coverage. Prescription medications and medical supplies (such as eyeglasses) are often not included. Healthcare professionals often mistake those in poverty, especially those between the 150% – 200% level range, as non-compliant patients (Society of Teachers of Family Medicine). Because people living in poverty often do not come in for preventative care, do not fill prescriptions, and fail to adhere to other recommendations, they can easily be mistaken for â€Å"bad patients.† It is a common misconception that they are ignorant to the importance of health care. It is imperative to understand that these individuals are doing the best they can with the finances and resources they have available. The main solution to health care problems those living in poverty face is a change to our health care system. Coverage needs to be available to all members of society for all health needs. As healthcare workers, we are not all called to be change agents in the world for this cause. However, we can educate ourselves to better understand poverty so we can deal effectively with those patients experiencing it. Americans almost always seem to be informed of poverty in under-developed countries. They also seem to be well-aware that poverty causes poor health. Still, many in the U.S. remain unaware that this problem exists in our country as well (Hope Through Healing Hands). Healthcare providers can communicate effectively with poverty-stricken individuals by showing a genuine desire to assist and serve them. Developing a sense of empathy, not sympathy, for the person shows that you care for them rather than feel bad for them. It is important to understand that these individuals’ sense of time occurs only in the present. They rarely think of the future or what effects their present actions might have on them later in life (TFC Association). They live for today because that is all they have. It is best to project kindness to these individuals, as with any group of people. Another very effective tool for helping those living in poverty is providing resources. Researching free or low-cost programs in your community and sharing them with these patients is a great way to help. Using appropriate humor is also a great way to lighten the mood and bring a smile to someone’s face that may be experiencing financial hardships (TFC Association). There are so many problems poverty brings upon an individual. Living with this burden can truly effect a person is so many ways. As a healthcare worker there is only so much we can do to assist people at these low-income levels. Although we can not provide a means for them financially or fix the living situation they are in, it is important to understand the impact we can have just by being compassionate. If you work in an office with ignorance to this issue, it is vital to inform those around you about the effects of poverty on health care. Before jumping to conclusions about a patient who is non-compliant, you may want to ask questions to find out if it is due to poverty. The key is to treat them with dignity and respect, regardless of their social status, and you really will make a difference. Works Cited 1. â€Å"Poverty Facts and Stats — Global Issues.† Global Issues : Social, Political, Economic and Environmental Issues That Affect Us All — Global Issues. Web. 24 Mar. 2011. . 2. â€Å"Poverty.† Yahoo! Health. Web. 24 Mar. 2011. . 3. â€Å"Poverty Data – Poverty Threshholds – U.S Census Bureau.† Census Bureau Home Page. Web. 24 Mar. 2011. . 4. â€Å"Finding Solutions to Poverty.† A Dollar a Day: What Is Poverty? Web. 24 Mar. 2011. . 5. â€Å"Understanding the Culture of Poverty.† Society of Teachers of Family Medicine. Web. 24 Mar. 2011. . 6. â€Å"Poverty and Healthcare: Fatefully Linked.† Hope Through Healing Hands. Web. 24 Mar. 2011. . 7. â€Å"Undernutrition: Disorders of Nutrition and Metabolism: Merck Manual Home Edition.† Merck & Co., Inc. Is a Global Research-driven Pharmaceutical Products Company. Web. 24 Mar. 2011. . 8. â€Å"Health Needs of People Living Below Poverty Level.† Transplant Fi nancial Coordinators. Web. 24 Mar. 2011. .

Technology1 essays

Technology1 essays As we wake our way into the new Millenium, scientists are becoming more aware of the new advancements in society technologically. Keeping up to date is mandatory, because the more breakthroughs there are; the more pressure scientists have, politically, financially, and socially. Will the Canadian dollar ever rise in value? This is one of the major financial pressures scientists have to day. Importing major key items is our problem because our dollar is not equivalent to our neighbors (U.S.A.). If am unbelievable scientific breakthrough was to occur, running to our government for financial help would not be an option. For the government has to worry about the National debt and making individuals happy. To make something new, money is needed, almost like if you decided build a model airplane form a kit, or make your own. To make and create your own would be more expensive. Recently a scientific breakthrough was made involving rocket ships and solar powered satalights. The new invention was a $48 million program funded by the U.S. (1). The thought was to save some money when building the model, but the cost couldnt be shaved one bit. A plan to build a model half the size could not be introduced until 2004, but the scientist wonders if the idea would have alrea dy been taken. These examples are just some of the financial pressures scientists have to deal with. Recently we have been hearing more about the topic of cloning. Millions of dollars every day are put towards the advancement of these technologies. But scientists are faced with many political problems, preventing the extensive continuation on the technology. Views of the public have made the outcome of the breakthrough questionable. Questions like, weather religion will be a political problem and weather the idea is morally correct have been raised. These political factors prevent scientists from discovering new methods and ways to cologne, and are poli ...